6.6-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Zimmermann tzimmermann@suse.de
commit 7cce65f3789e04c0f7668a66563e680d81d54493 upstream.
The ast driver protects the commit tail against concurrent reads of the display modes by acquiring a lock. The comment is misleading as the lock is not released in atomic_flush, but at the end of the commit-tail helper. Rewrite the comment.
Signed-off-by: Thomas Zimmermann tzimmermann@suse.de Fixes: 1fe182154984 ("drm/ast: Acquire I/O-register lock in atomic_commit_tail function") Cc: Thomas Zimmermann tzimmermann@suse.de Cc: Jocelyn Falempe jfalempe@redhat.com Cc: Dave Airlie airlied@redhat.com Cc: dri-devel@lists.freedesktop.org Cc: stable@vger.kernel.org # v6.2+ Reviewed-by: Jocelyn Falempe jfalempe@redhat.com Link: https://lore.kernel.org/r/20250324094520.192974-2-tzimmermann@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/ast/ast_mode.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/ast/ast_mode.c +++ b/drivers/gpu/drm/ast/ast_mode.c @@ -1868,9 +1868,9 @@ static void ast_mode_config_helper_atomi
/* * Concurrent operations could possibly trigger a call to - * drm_connector_helper_funcs.get_modes by trying to read the - * display modes. Protect access to I/O registers by acquiring - * the I/O-register lock. Released in atomic_flush(). + * drm_connector_helper_funcs.get_modes by reading the display + * modes. Protect access to registers by acquiring the modeset + * lock. */ mutex_lock(&ast->ioregs_lock); drm_atomic_helper_commit_tail_rpm(state);